According to Walker and Her Colleagues, What Role Does Stress

According to Walker and her colleagues, what role does stress play in the development of schizophrenia?

A) Schizophrenics experience more stress than non-schizophrenics.
B) Schizophrenics experience less stress than non-schizophrenics.
C) Schizophrenics are more vulnerable to stress than non-schizophrenics.
D) Schizophrenics are more likely to suffer from anxiety disorders than non-schizophrenics.